Control unit for a cash register



FIG. 1 is a top, left and front perspective view of control unit for a cash register, showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof. 

The ornamental design for control unit for a cash register, as shown and described. 